Triangular paint brush



FIG. 1 is a perspective view of the bottom and one side of a triangular paint brush showing our new design;

FIG. 2 is a reduced top plan view of FIG. 1;

FIG. 3 is a reduced opposite side elevation view of FIG. 1; and,

FIG. 4 is a right end elevation view of FIG. 1.

The broken lines showing a portion of the handle and a portion of the bristles are for illustrative purposes only and the broken lines immediately adjacent the surface shading on the handle and those immediately adjacent the ends of the bristles represent the bounds of the claim. None of the broken lines form part of the claimed design. 

The ornamental design for a triangular paint brush, as shown and described. 